Selecting yes signifies that the ATM Forum polynomial (coset polynomial) be added to HEC before the HEC verification of a received cell. In the transmit direction, this selection enables generation of a HEC with the coset polynomial value. Selecting no signifies that the ATM Forum polynomial (coset polynomial) *not* be added to HEC before HEC verification of a received cell. In the transmit direction, selecting no enables generation of a HEC without the coset polynomial value.